Ok so I have always been taught that pre-marital sex is a sin. However, I have known several friends that waited until their wedding day to even kiss their spouse!! Does this mean that kissing is a sin and should be saved for marriage just like sex? Or was this a personal choice made by these individuals?

Galatians 5:16 But I say, walk by the Spirit, and you will not gratify the desires of the flesh.

Hebrews 13:4 Let marriage be held in honor among all, and let the marriage bed be undefiled, for God will judge the sexually immoral and adulterous.

Is the bible saying that kissing is a sin or just sex? Is kissing considered "feeding the flesh"? Are you "sexually immoral" if you kiss before you're married? I just want some opinions from other christian people so any comment is great!